1984 Ford F Series Trucks Differential Carrier F-350 - 4WD - Dana 70 HD - Replacement - Standard - 4.56 And Up Carrier Break - For HD Rear End - Rear guaranteed to replace your current 1984 Ford F Series Trucks Differential Carrier F-350 - 4WD - Dana 70 HD - Replacement - Standard - 4.56 And Up Carrier Break - For HD Rear End - Rear. 1984 Ford F Series Trucks Differential Carrier comes new OEM 1984 Ford F Series Trucks Differential Carrier aftermarket new 1984 Ford F Series Trucks Differential Carrier of remanufactured 1984 Ford F Series Trucks Differential Carrier F-350 - 4WD - Dana 70 HD - Replacement - Standard - 4.56 And Up Carrier Break - For HD Rear End - Rear.